Light to moderate rain and thundershowers at many places are likely over Ariyalur, Cuddalore, Karur, Nagapattinam, Perambalur, Sivaganga, Thanjavur, Thoothukudi and Tiruchirappalli districts of Tamil Nadu with strong average winds of 40 kmph gusting at 80 kmph during the next 2 to 8 hours.